Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, 0, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A150890
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, 0, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =34a(4) =152a(5) =698a(6) =3270a(7) =15530a(8) =74495a(9) =359929a(10) =1748735a(11) =8533798a(12) =41791676a(13) =205246149a(14) =1010356859a(15) =4983305505a(16) =24618899401a(17) =121792258481a(18) =603229234767
External references
- oeis: A150890